The Levitating Buddha
天壇大佛翻新之後
I'm happy to announce that my first NFTs are now available at Digital Art Fair Asia and https://refinable.com/
#tiantanbuddha #bigbuddha #levitation #nft #animation #photoshop #photomanipulation #surrealhk #hongkong
同時也有4部Youtube影片,追蹤數超過75萬的網紅志祺七七 X 圖文不符,也在其Youtube影片中提到,本集廣告與「圖文不符上課囉」合作播出 💭想利用線上課程開創被動收入嗎? 💭該如何將自己的知識 Knowhow 轉化成線上課程體裁呢? 打造十多堂熱銷課程、狂銷六萬多人 #圖文不符上課囉 暢銷線上課程的煉成心法,大・公・開!✨ 志祺將在本場講座中,分享圖文不符上課囉的開課秘訣。 從市場、內容、講...
nft, and art 在 Facebook 的精選貼文
多謝大家支持 #903國民教育。節目中提及的展覽,一套成人及一套學生門票,已經送出。謝謝大家支持及參與。
想得到更多資料的朋友,可以去以下的網站看看。多謝大家支持,感謝,感恩。
nft, and art 在 Taipei Ethereum Meetup Facebook 的精選貼文
📜 [專欄新文章] Gas Efficient Card Drawing in Solidity
✍️ Ping Chen
📥 歡迎投稿: https://medium.com/taipei-ethereum-meetup #徵技術分享文 #使用心得 #教學文 #medium
Assign random numbers as the index of newly minted NFTs
Scenario
The fun of generative art NFT projects depends on randomness. The industry standard is “blind box”, where both the images’ serial number and the NFTs’ index are predetermined but will be shifted randomly when the selling period ends. (They call it “reveal”) This approach effectively solves the randomness issue. However, it also requires buyers to wait until the campaign terminates. What if buyers want to know the exact card right away? We’ll need a reliable onchain card drawing solution.
The creator of Astrogator🐊 isn’t a fan of blind boxes; instead, it thinks unpacking cards right after purchase is more interesting.
Spec
When initializing this NFT contract, the creator will determine the total supply of it. And there will be an iterable function that is randomly picking a number from the remaining pool. The number must be in range and must not collide with any existing ones.
Our top priority is accessibility/gas efficiency. Given that gas cost on Ethereum is damn high nowadays, we need an elegant algorithm to control gas expanse at an acceptable range.
Achieving robust randomness isn’t the primary goal here. We assume there’s no strong financial incentive to cheat, so the RNG isn’t specified. Implementers can bring their own source of randomness that they think is good enough.
Implementation
Overview
The implementation is pretty short and straightforward. Imagine there’s an array that contains all remaining(unsold) cards. When drawIndex() is called, it generates a (uniform) random seed to draw a card from the array, shortens the array, and returns the selected card.
Algorithm
Drawing X cards from a deck with the same X amount of cards is equal to shuffling the deck and dealing them sequentially. It’s not a surprise that our algorithm is similar to random shuffling, and the only difference is turning that classic algo into an interactive version.
A typical random shuffle looks like this: for an array with N elements, you randomly pick a number i in (0,N), swap array[0] and array[i], then choose another number i in (1,N), swap array[1] and array[i], and so on. Eventually, you’ll get a mathematically random array in O(N) time.
So, the concept of our random card dealing is the same. When a user mints a new card, the smart contract picks a number in the array as NFT index, then grabs a number from the tail to fill the vacancy, in order to keep the array continuous.
Tweak
Furthermore, as long as the space of the NFT index is known, we don’t need to declare/initialize an array(which is super gas-intensive). Instead, assume there’s such an array that the n-th element is n, we don’t actually initialize it (so it is an array only contains “0”) until the rule is broken.
For the convenience of explanation, let’s call that mapping cache. If cache[i] is empty, it should be interpreted as i instead of 0. On the other hand, when a number is chosen and used, we’ll need to fill it up with another unused number. An intuitive method is to pick a number from the end of the array, since the length of the array is going to decrease by 1.
By doing so, the gas cost in the worst-case scenario is bound to be constant.
Performance and limitation
Comparing with the normal ascending index NFT minting, our random NFT implementation requires two extra SSTORE and one extra SLOAD, which cost 12600 ~ 27600 (5000+20000+2600) excess gas per token minted.
Theoretically, any instantly generated onchain random number is vulnerable. We can restrict contract interaction to mitigate risk. The mitigation is far from perfect, but it is the tradeoff that we have to accept.
ping.eth
Gas Efficient Card Drawing in Solidity was originally published in Taipei Ethereum Meetup on Medium, where people are continuing the conversation by highlighting and responding to this story.
👏 歡迎轉載分享鼓掌
nft, and art 在 志祺七七 X 圖文不符 Youtube 的最佳解答
本集廣告與「圖文不符上課囉」合作播出
💭想利用線上課程開創被動收入嗎?
💭該如何將自己的知識 Knowhow 轉化成線上課程體裁呢?
打造十多堂熱銷課程、狂銷六萬多人
#圖文不符上課囉 暢銷線上課程的煉成心法,大・公・開!✨
志祺將在本場講座中,分享圖文不符上課囉的開課秘訣。
從市場、內容、講者三面向切入,帶大家了解一堂攻心線上課程該如何規劃設計,成為學員相互推薦的超人氣產品。
💡 本次講座在 OnlyTalk 獨家販售,只要 499 元就能無限次觀看,並獲得講座完整簡報!
👉🏻 開啟線上課程第一步,先從這裡開始!點擊連結了解更多內容:
https://socialdon.group/onlytalk2-7
本集節目內容由志祺七七頻道製作,不代表「圖文不符上課囉」立場。
——
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#迷因 #區塊鏈
各節重點:
00:00 前導
01:18「暢銷線上課程的煉成心法」廣告段落
02:15 NFT是什麼?
03:17 鑄造一顆NFT
04:00 CryptoKitties:NFT的革命性實驗
04:48 NBA也來湊一腳?
05:34「加密藝術」狂潮襲來!
06:45 萬物NFT時代來臨?
07:33 NFT沒有想像中美好?
08:48 我們的觀點
10:49 提問
11:04 結尾
【 製作團隊 】
|企劃:品維
|腳本:品維
|編輯:土龍
|剪輯後製:Pookie
|剪輯助理:歆雅/珊珊
|演出:志祺
——
【 本集參考資料 】
→瘋NFT加密!推特第一則貼文賣破8千萬天價,買家到底買到了什麼?:https://bit.ly/2VGPN2f
→音樂NFT價值在哪?為何周興哲作品賣出2.8萬美元,Linkin Park、血肉果汁機都上鏈?:https://bit.ly/3yE2l8Q
→史上第一則推文NFT以291萬美元拍定售出,得標者到底買到了什麼?:https://bit.ly/3s4Jv8p
→NFT狂熱》一張jpg圖檔,拍賣出天價19億,加密藝術正在崛起?:https://bit.ly/3jH1Gx7
→NFT 熱潮的背後,寄生侵權者開始野蠻生長:https://bit.ly/3fNqyT4
→對 NFT 的一些想法:https://bit.ly/2X3Xlwo
→火星投研 | 买FLOW为时已晚了?NFT会昙花一现?那我们还要玩下去吗?:https://bit.ly/3lTMrnz
→NBA Top Shot:2 萬人瘋狂搶購收藏的 NBA 球員短影片卡是什麼?:https://bit.ly/3iwTMXZ
→NFT — 區塊鏈與虛實整合的關鍵:https://bit.ly/3jIMWxO
→加密貨幣收藏品和非同質化代幣 (NFT) 指南:https://bit.ly/3xBrzUf
→「數位藝術」盜版無從打擊?談談 NFT 引發的「侵權難題」:https://bit.ly/2U7XoX2
→誰要買這個啦! 推特執行長賣推文,「加密熱潮」新標的,NFT是什麼?:https://bit.ly/37suK65
→如何創造自己的NFT?:https://bit.ly/3m2tI9t
→NFT 降溫後再談加密藝術價值:投機泡沫還是新的杜尚?:https://bit.ly/3fKAJHF
→NFTs, Explained:https://bit.ly/3xEFvfX
→NFTs Are Fueling a Boom in Digital Art. Here’s How They Work | WSJ:https://bit.ly/3s3AbSl
→NFTs And The Missing Layer Of Utility:https://bit.ly/2VEkmFx
→Are NFTs The New Crypto? A Guide To Understanding Non-Fungible Tokens:https://bit.ly/3CAwzvS
→Why people are buying cartoon cats on the blockchain:https://bit.ly/3yzWxNN
【 延伸閱讀 】
→你必須知道的三大 NFT 熱門專案:NBA Top Shot、CryptoPunks 以及 Hashmasks:https://bit.ly/3s2uLqG
→NFT 風潮再起 — 獨自擁有的珍貴:https://bit.ly/2VybX75
→Cryptopunk NFT|Genies 個人替身 |複製聲音 Veritone:https://bit.ly/2VGUrwW
→NFT跨入學術界!UC Berkeley拍賣兩大諾貝爾獎論文 NFT,作未來研究經費:https://bit.ly/3yAlbO5
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nft, and art 在 Giovanna Sun Youtube 的最佳貼文
AI, Algoritium, and NFT art: Interview SupeRare artist, Anne Spalter.
Digital mixed-media artist Anne Spalter is an academic pioneer who founded the original digital fine arts programs at Brown University and The Rhode Island School of Design (RISD) in the 1990s and authored the internationally taught textbook, The Computer in the Visual Arts (Addison-Wesley, 1999).
(https://annespalter.com/about/)
In this session, we learn AI and NFT art from an established artist, Anne Spalter.
Anne Spalter shared her technology and art in the video. She is one of the artists featured by SuperRare, an NFT art marketplace focus on rare, seen art, and showcase selected artists and works.
Host: Heidi Russell. Giovanna Sun
Interviewer: Anne Spalter
Let's connect!
Amazon author page: amazon.com/author/giovannasun
Instagram: @giovannasun
Twitter: https://twitter.com/GiovannaSun
Podcast: apple.co/2X3hKyy
Soundcloud: https://soundcloud.com/giovannasun
Contact me at dubwoman@gmail.com
nft, and art 在 Giovanna Sun Youtube 的最佳解答
Trance Utopia-Blue 2 Women video by Giovanna Sun
To collect my tokenized art through the Open Sea (ETH only):
https://opensea.io/collection/trance-utopia
-------------------------
Let’s connect you and me.
Amazon author page: amazon.com/author/giovannasun
Instagram: @giovannasun
Twitter: https://twitter.com/GiovannaSun
Podcast: apple.co/2X3hKyy
Soundcloud: https://soundcloud.com/giovannasun
Contact me at dubwoman@gmail.com